Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 1123 (Div. 2)
25:04:51
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
2264A
Rumb Needs a Hand
implementation
,
implementation
,
implementation
,
sortings
,
sortings
,
sortings
,
two pointers
,
two pointers
,
two pointers
800
x13728
2263B
Min Matrices
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
900
x12115
2263A
Min Max Game
games
800
x15853
2260B
Monocarp and Projects
brute force
,
math
,
number theory
900
x14927
2260A
Monocarp's Contest
implementation
800
x19240
2259B
Minus Two
math
,
number theory
,
number theory
,
number theory
,
number theory
,
number theory
800
x23717
2259A
Moo Language School
brute force
,
greedy
,
greedy
,
greedy
,
greedy
,
two pointers
800
x26777
2258B1
Carrot Chopdown (Easy Version)
brute force
,
games
,
math
900
x15261
2258A
Odd Eraser
math
800
x18935
2257B
Gigantomachy
math
,
math
800
x18916
2257A
Creating Abbreviations
brute force
,
strings
800
x20727
2256A
Three Numbers on the Blackboard
math
,
math
,
math
,
math
,
sortings
800
x25362
2254B
Evanescent
implementation
,
strings
,
two pointers
900
x25448
2254A
Riptide
implementation
,
sortings
800
x36553
2253A
The Best Card
greedy
,
math
,
number theory
800
x21327
2252A
Boss Fight
data structures
,
greedy
,
greedy
800
x18830
2250A
Threshold Movement
brute force
,
implementation
,
math
800
x19144
2248A
You Delete, I Delete
greedy
800
x20832
2247B
Yet Another Constructive
constructive algorithms
900
x16461
2247A
Zero Sum
constructive algorithms
,
dp
,
number theory
800
x22669
2246B
ezraft and Array
constructive algorithms
,
number theory
900
x17616
2246A
farmpiggie and Subset Sum
constructive algorithms
800
x19878
2245A
Who Watches the Watchpig?
greedy
800
x14214
2244B
Nikita and Books
greedy
,
greedy
,
math
,
math
,
sortings
,
sortings
800
x25200
2244A
Iskander and Drawings
dp
,
games
,
greedy
,
strings
800
x30629
2242A
Bigrams
sortings
,
strings
800
x25234
2241A
Divide and Conquer
greedy
,
math
,
number theory
800
x35453
2240A
Another Popcount Problem
greedy
800
x17287
2238B
Crimson Triples
dp
,
math
,
number theory
900
x16713
2238A
Another Puzzle from Papyrus
greedy
,
math
,
sortings
800
x20302
2237A
Destroying Towers
games
,
greedy
,
schedules
800
x22400
2236B
Tatar TV Show
greedy
,
math
,
strings
800
x29380
2236A
Games on the Train
greedy
,
math
800
x35896
2234B
Palindrome, Twelve and Two Terms
brute force
,
constructive algorithms
,
math
800
x22828
2234A
Euclid, Sequence and Two Numbers
math
,
number theory
,
sortings
800
x24850
2233B
Different Distances
constructive algorithms
900
x18582
2233A
AI Project Development
brute force
,
math
800
x23591
2232B
Cake Leveling
binary search
,
greedy
,
math
900
x21719
2232A
Convergence
greedy
,
sortings
,
sortings
,
sortings
800
x23814
2231A
Construct an Array
constructive algorithms
800
x26099
2230A
Optimal Purchase
implementation
,
math
800
x24147
2229C1
We Be Flipping (Easy Version)
constructive algorithms
,
greedy
900
x16395
2229B
Absolute Cinema
greedy
,
math
800
x19017
2229A
Slimes on a Line
brute force
,
greedy
,
math
800
x19127
2228A
Marisa Steals Reimu's Takeout
greedy
,
implementation
800
x22382
2227C
Snowfall
constructive algorithms
,
math
800
x23809
2227B
Party Monster
greedy
800
x28867
2227A
Koshary
implementation
,
math
800
x32847
2226B
Everything Everywhere
greedy
,
math
,
math
,
number theory
,
number theory
900
x15375
2226A
Disturbing Distribution
greedy
,
math
800
x16051
2225B
Alternating String
brute force
,
greedy
900
x17966
2225A
A Number Between Two Others
greedy
,
math
800
x22399
2224A
Zhily and Array Operating
constructive algorithms
,
greedy
800
x12401
2222A
A Wonderful Contest
brute force
,
dp
,
math
800
x12732
2220A
Blocked
greedy
,
sortings
800
x21764
2218C
The 67th Permutation Problem
constructive algorithms
,
greedy
,
math
800
x32178
2218B
The 67th 6-7 Integer Problem
greedy
,
math
800
x42266
2218A
The 67th Integer Problem
brute force
,
games
,
implementation
,
math
800
x44660
2217A
The Equalizer
math
800
x25616
2216A
Course Wishes
greedy
900
x6554
2211A
Antimedian Deletion
implementation
,
math
800
x18121
2210B
Simply Sitting on Chairs
data structures
,
greedy
900
x20123
2210A
A Simple Sequence
constructive algorithms
,
dp
,
greedy
,
number theory
800
x25219
2209B
Array
greedy
900
x22175
2209A
Flip Flops
greedy
800
x23872
2208A
Bingo Candies
constructive algorithms
,
math
800
x22448
2207A
1-1
greedy
,
strings
800
x15283
2205B
Simons and Cakes for Success
implementation
,
math
,
math
800
x17876
2205A
Simons and Making It Beautiful
brute force
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
constructive algorithms
800
x18901
2204B
Right Maximum
greedy
800
x21666
2204A
Passing the Ball
brute force
,
implementation
800
x23935
2203A
Towers of Boxes
math
800
x20311
2202A
Parkour Design
math
,
math
,
math
,
math
800
x17729
2200C
Specialty String
brute force
,
greedy
,
strings
900
x25046
2200B
Deletion Sort
bitmasks
,
brute force
,
greedy
,
sortings
800
x28768
2200A
Eating Game
greedy
800
x32141
2197A
Friendly Numbers
binary search
,
brute force
,
expression parsing
,
math
,
schedules
800
x24411
2195B
Heapify 1
implementation
,
sortings
900
x27395
2195A
Sieve of Erato67henes
math
,
number theory
800
x38672
2194A
Lawn Mower
greedy
,
math
800
x25471
2193B
Reverse a Permutation
greedy
800
x31736
2193A
DBMB and the Array
brute force
,
math
800
x45141
2192A
String Rotation Game
brute force
,
strings
800
x19248
2191A
Array Coloring
constructive algorithms
800
x29141
2189A
Table with Numbers
greedy
,
implementation
800
x25335
2188A
Divisible Permutation
constructive algorithms
800
x27030
2185C
Shifted MEX
implementation
,
sortings
900
x31482
2185B
Prefix Max
greedy
800
x44362
2185A
Perfect Root
constructive algorithms
,
math
800
x47091
2184A
Social Experiment
math
800
x40627
2183A
Binary Array Game
games
800
x24375
2182B
New Year Cake
brute force
800
x24531
2182A
New Year String
constructive algorithms
,
greedy
,
implementation
,
strings
800
x26584
2180B
Ashmal
greedy
,
strings
800
x25416
2180A
Carnival Wheel
brute force
,
number theory
800
x26686
2179B
Blackslex and Showering
dp
,
greedy
,
implementation
800
x29539
2179A
Blackslex and Password
math
,
strings
800
x35941
2178B
Impost or Sus
dp
,
greedy
,
implementation
,
strings
900
x22760
2178A
Yes or Yes
greedy
,
strings
800
x26880
2176A
Operations with Inversions
greedy
,
implementation
,
math
800
x30198
←
1
2
3
...
14
15
→
User lists
Name